/* Copyright  2009
   @Author
   Richard Changde Yin            e-mail yinchangde@hotmail.com

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
   
/**
 * @filename: item/outer_ref.cc
 */ 

#include <server_includes.h>
#include CSTDINT_H
#include <item/uint.h>
#include <item/outer_ref.h>

/*
  Prepare referenced outer field then call usual Item_direct_ref::fix_fields

  SYNOPSIS
    Item_outer_ref::fix_fields()
    session         thread handler
    reference   reference on reference where this item stored

  RETURN
    false   OK
    true    Error
*/

bool Item_outer_ref::fix_fields(Session *session, Item **reference)
{
  bool err;
  /* outer_ref->check_cols() will be made in Item_direct_ref::fix_fields */
  if ((*ref) && !(*ref)->fixed && ((*ref)->fix_fields(session, reference)))
    return true;
  err= Item_direct_ref::fix_fields(session, reference);
  if (!outer_ref)
    outer_ref= *ref;
  if ((*ref)->type() == Item::FIELD_ITEM)
    table_name= ((Item_field*)outer_ref)->table_name;
  return err;
}

void Item_outer_ref::fix_after_pullout(Select_Lex *new_parent,
                                       Item **ref_item)
{
  if (depended_from == new_parent)
  {
    *ref_item= outer_ref;
    outer_ref->fix_after_pullout(new_parent, ref_item);
  }
}



